Motorcycle seat backrest



FIG. 1 is a perspective view of a motorcycle seat backrest showing my new design;

FIG. 2 is a rear elevational view thereof, the front being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left-side elevational view thereof; and,

FIG. 6 is right-side elevational view thereof.

The broken lines are included for the purpose of illustrating environment and form no part of the claimed design. 

The ornamental design for a motorcycle seat backrest, as shown and described. 